War Service:
Airman 1st Class 25501 JAMES OLIVER JESSOP, MiD, Royal Flying Corps was killed in action over the North Sea on 4 July 1917.

The London Gazette of 17 July 1917 reported in The Times of 18 July 1917:During a recent hostile air raid Captain John Palethorpe with Air Mechanic Jessop as gunner was engaged in an endurance trial from a testing squadron. When about three miles from the coast a formation of 17 aeroplanes was sighted. Capt. Palethorpe at once attacked with great courage and determination, under very heavy fire, till the Gunner was killed. He then landed, and having procured another Gunner, endeavored to renew the attack.His Majesty the KING has been graciously pleased to approve of the award of the Military Cross to Capt. John Palethorpe, R.F.C.// Mentioned in Despatches for gallant and distinguished services in connection with recent enemy air raids: - No. 25501 1st Cl. Air Mech. James Oliver Jessop, R.F.C. (Killed in action.)//

The 'testing squadron' referred to was actually the Aircraft and Armaments Experimental Establishment, Martlesham Heath, Suffolk.